captioning sponsored by wnet >> sreenivasan: on ts edition for sunday june 3: the trump legal team memo, raising constitutional questions. a look at robert kennedy's legacy, 50 years after his assassination. and, navajo life seen on a monumental scale. next on pbs newshour weekend. r >> "pbs newshekend" is made possible by: bernard and irene schwartz. the cheryl and philip milstein chamily. sue and edgar heim, iii. dr. p. roy vagelos and dlona t. va the j.b. foundation. the anderson family fund. rosalind p. walter barbara hope zuckerberg. corporate funding is provided by mutual of america-- designing customized individual and group retirement products.

that's why we're your .retirement compa >> additional support has been provided by: and by the corporation for public broadcasting, and by ieontributions to your pbs station fromrs like you. thank you. from the tisch wnet studios at lincoln center in new york, hari sreenivasan. >> sreenivasan: good evening and thank you for joining us. today, china warned of a trade war if the united states increases tariffs. the canadian prime minister used the terms "insulting andac ptable" in response to new u.s. tariffs on his country's steel and aluminum. and the planned historic summit between president trump and north korea's leader kim jong us ow less than ten days away. but in washington this morning, most of the talk was about a 20- page confidential ent from the president's legal team to special counsel robert mueller in january -msterday the "new york times" published the fith-old letter, which made broad claims

of presidential power. mr. trump's lawyers arhat the president cannot not be compelled to testify because it demeans the office. they said he cannot commit obstruction of justice because he is the nation's chiefaw enforcement officer and it would mean he was obstructing himselfh also stated he has the power to stop any investigation by the department of jusce, and that he could use his power to pardon if needed. >> do you and the president'se attorneys belie president has the power to pardon himself? >> he-- he's not but he probably does. he has no intention of pardoning himself but he probably, not to say he can't. i mean, that-- that's another really interesting constitutional argument, can the president pardon himself? >> sreenivasan: yet in a separate interview today, giuliani also rejected the possibility of a pardon. >> the president of the unitedst es pardoning himself would just be unthinkable. and it would lead to probably an immediate impeachment. you know you get your house, senate would be under tremendous pressure.

d esident trump has no nee do that. g. didn't do anything wr >> sreenivasan: giuliani, who was not on the president's legal team when the letter wasai written, sd the presidentgh would fiany subpoenas, but also said mr. ump might agree answer questions from the special counsel if "they cance convs it will be brief." rain is coming to the reue for firefighters battling raging wildfires in northern new mexico and southern colorado. low humidity and high temperures helped the "ut park fire" in new mexico and t"" 4-16 fire" in colorado scorch nearly 32,000 acres. rain and flash flooding are pred.ted for the region today the fires threatened close to 2,000 homeand forced hundreds of residents to evacuate from some remote communities. thousands of women with early- stage breast cancer wi no longer need chemotherapy as part of their treatment. in a major international stu released today, researchers say they are now able to use gene testing on tumor samples to identify women who need only the

hormone-blocking drug tamoxifen. according to one of the study's authors, the new findings will apply to about 60,000 women a year in the united states. prime minister theresa may joined survivors, victim's families, and emergency workers today to mark the one-year anniversary of the terror attack which began on the london bridge. islamic state-inspired tremists killed eight and wounded 48 others. more than 700 people attended services at londca's southwark edral, and afterward victim's families planted an olive tree on cathedl grounds using compost from all the flowers left behind at the makeshift memorial. in a tribute, "london united"oj was later ted on london bridge. of afghanistan, nearly hal all children are not in school. a new study from the u.n. ouchildren's fund, unicef, that 3.7 million afghan children between the ages of seven and 17 are receiving no formal education. 60% of them are girls.

the study pointeto violence, poverty, and child marriage as reasons. both isis and the talin oppose education for girls and have used violence and threats to close schools in afghanistan. what can be expected from hurrice season? find out at pbs.org/newshour. >> sreenivasan: this week will mark 50 years since senator robert kennedy was gunned down in los angeles, moments after claiming victory in the california presidential primary. yet he continues to be the subject of intense interest, even fascination: what was he campaigning for? what made him unique? here to talk about that is special correspondent jeff greenfield, who was a aide and campaign speechwriter for robert kennedy, he joins us from santa barbara. i think in part that isofas explanation, being taken off t scene at age 42 enables people

to pour tntir hopes him. they can say he would have ender the n vietnam and healed the division information the country and made a real start on endemic poverty, that's one explanation. the other is the unique persona of this guy. i mean here was theecond most powerful person in america, suddenly thrown into political exile because of his brother's murder, who somehow deep pend an acute feeling of empathy with the folks left out, bls in the ghetto, native americans on reservions, hispanics and migrant work camps, poor white sox in eastern kentucky, and that kind of passionatein lvement is something i think we still are looking to see again somehow with any of our political figures. >> sreenivasan: were those political ideas unique at the time? >> vch so. robert kennedy and this isrs widely misunod still was not an orthodox liberal, he often talked about th detachment and the distance of an overbearing federalgo rnment and believed in local

control of community projects. he was a severe critic of the tewelfare sys he would not have been content with federal aid to education because he said we need restructure the schools. so in a lot of ways he was different from the prevailing liberal sentiments which is why i think what he had to say ruck such a responsive cord both among his supporters and >> sreenivasan: were there lessons from 68 that we could apply today? >> well, half a century is a very long time blue is one n,ctor. back the coalition in the democratic party between blacks and white workg class was already fracturing, there were fights in cities over busing for school integration, police practices in crime, welfare, access to jobs a an housing, he began at the end to talk a very kind of liberal populace line about for instance rich people not paying taxes. when you look at what happened for instance in the last mpaign, you see that that fracturing in the democratic party is now almost comete. i have no idea whether robert

kennedy could have held that together, but that was a big concern of his, that still very much dominates thearty's concerns today. >> sreenivasan: being of, speaking of concern today we have aot of news this week,e have a korea summit that might be back on, i say might. it looks like it will be, but who knows? we have got traaders talk between the our allies, canada, mexico and the european union, what do you is the big story? ness one of the things t wt hit the barrage of attacks from the right entree gowdy the chair of the house oversight commission, who up until now has a hero on the right for pursuing alleged corruption anc sdals in the obama administration but when he thought the fbi acted properly in getting an informant tto talk to people in themp campaign, the entire right win of the media and the republican party just turned against him, called him a rhino, republican in name only, why that is so

interesting in, trump continues to succeed in building a wallim aroundo protect him from what, from whatever investigations might turn out, because he now ranksigher among his own party members than any president in recent ameran history, except for george bush right after 9/11. so that may not behe headline of the week but it struck me as one of the mo intriguing. >> sreenivasan: one of the series of headlines we have seen over the last couple of days is "the new york times" obtaining a legal memo that the trump team had sent to robert mueller and you have got some of his aides saying the president can basically pardon hself. what stands out about the strategy here? you know, every time i think things can't get weirder, back in 1977 ex-president nixon told interviewer david frost well if the president does it that means it is not illegal, and there wan a mi of outrage, what kind of assertion omf liitless president july power is that?

well, trump's lawyers have made exactly that argument with respect to his power over pardons and his power overhe investigation. it is an assertion of president july power that is unlike anything i member anywhere in our history and we will see whether the fallout of that may at thism point persuade republicans in congress to say, wait a minute, mr. president, you are overstepping here, whether they just say, okay, in that is what the president says, we are okay with n. >> sreeni: jeff mgreenfield, joining us f santa barbara, thank you so much. >> okay. >> >> sreenivasan: artificial telligence, drones, warfare, and google. it's a mixture that causedn uproar inside the tech giant where the early motto was "don't be evil." so what's behind google's contract with the department of defense for a project called maven? joining me now from oakland is gizmodo reporter kate conger who

has been covering the story. what was the extent of what google was planning to do and work with on this project mav? >> google's role in this project has been to create artificial intelligence to do imagen classificatione footage collected by drones, and so they were trying to help t department of defense mark objects in this footage to say this car is a car, this building is a building, this is a person. >> sreenivasan: okay. and the employees at google had a prolem with this for theast several weeks, but how did they prest it? what was their concern? >> so there are a couple er different co within the employees. some employees at google feel like the company shouldn't be volved with the military at at all. there are other employees thatin fe that using artificial intelligence in this context is particularly risky and foresee 0 a future where eve have a computer making the decision of whether or not to carry out a drone strike and they feel like a human should be the one who is making that

decisi, no at computer. and so there have been a few things they have done to push back and protest. there was an open letter they sent around the company asking google to cancel the contractus and obv they have been speaking to the press about some of 0 their objections as well. >> sreenivasan: have google executives been thinking about this? you have obtained some e-mails, what was the 0 shatter among te c suite? >> the executive conversations teresting. when they first took on this project there were a lot of, there was a lot of catnven about the concern of how the public would perceive this, and particularly in the ne of ai i a military context. there is a lot of conversation back and forth of, you know, how are we going to shape public perception about this? how is this going to reflect on our image? but there wasn't as conversation about the actua ethics of this kind of decision and that ethical conversation is the one that empyees have really been pushing for. >> sreenivasan: and how big of a part of google's revenue or how significant line of business is this to google?

>> so thtr maven cct itself is not particularly significant for google. i believe the earliest numbers w they h around 15 million, and for google that is not veryl much money al. but the idea was that this would sort of be foot in the door for them with future military contracts and could put them owto the running for much, much larger contractsthe road. >> sreenivasan: if google doesn't do this, will other or are other comanies lobbying for these contracts? >> yes. sohe maven contract was a competition between a couple of other major cloud provders and it is entirely likely that one of those other companies will step up and fill google's shoes once theirontract expires in 2019. >> sreenivasan: so google decided they are not going to renew this in 2019 which means they continue to work on this project. e there ripple effects going forward for some of the employees that are sti concerned and inside google today? >> i believe so. i think that theye emppush back on this will continue,

employees have said from the g they want the contra to be canceled and it is knots what has happened so far. google says they will finish out the contract. and i expect the employees will probably continue to push back on le's involvement mr. thi >> sreenivasan: is there a rger conversation that i happening among tech companies about how they should be working with or not working with the u.s. government? therehink so. you know, has been a lot of reckoning throughout the tech industry over the last year or so where employees are kind of wondering about how the products that they create are being usedyo. you knowsee this at facebook in the wake of the cambridge analytical scandal and with 0 twit ear little bit with the trolling and harassmt going on there and of course with google in this military contract theree is a lot of questibing aout, you know, whether we are creating here is it fundamentally going to be used good or not. >> sreenivasan: all right. kate conger joining us from gizmodo, thank you so much. >> thank you.

>> sreenivasan: from oakland california to phoenix, arizona, street artist chip thomas shares stories of the navajo people with large scale photographs. but he has been living in the four corners region of the american west for years, and he's known for something ee. this story was produced by kqed arts, our pbs member station in san francisco. >> there's a part of what i do that's being an intentional provocateur. puing work out that people might not expect to see, in a particular space, especially at that size. this piece speaks to a land dispute on the navajo nation, and in this area, the peabody coal company, and the hopi tribe

were forcibly removing navajo people from this area. this photograph was taken in 1983; the guy whtook it was a ar friend of mine. i just really wanted to do this for him, but also get bis message ouause it unfortunely remains necessary. >> i have a one year old, so that's what caught my eye, really. >> yeah, good. >> throwing that little babyifp, that's bea. >> yeah, that's the beauty of this photograph. it's multi-layered, it's complex, a lot like life. my name is chip thomas, street art name jetsonorama. and i live on the navajo, or diné nation, about 35 miles south of the border with utah, in incredibly beautiful canyon country. >> for a long time, it was a mystery. who's this guy putting all this stuff up?

he puts his artwork on abandoned homes, abandoned buildings. he brings life back to it. >> the diné should be the materially wealthiest group of people living in the united states. t with an unemployment rate over 50%, they are amongst the poorest materially. and within that environment, i want to create work that reminds people of the beauty they shared with me, you kno y over the past rs. hey sharice. >> hi. >> my day job, i work as a physician in primary care clinic. amelia, you're doing so good. she looks great. the way i started working here

and living here is the national health service corps, program to encourage people going io healthcare fields to work in a health shortage area. i finished my four year obligation in 1991 and just fell in love with work, the people, the land. exploring the local four corner's region, i would talk with people and ask if they were comfortable with me, bringing my camera, and taking photos. i arted having some shows in galleries. but i wanted to go bigger.or createwhere the people in the work got to see themselves represented. >> his murals reflect back our everyday life. and to know that he gets it, het understands .

>> thank you for stopping by. a lot of the work that appears off of the reservation is an opportunity to challenge people to see and think little bit differently about an issue. i was invited to take part in the show to bring awareness to nithe legacy of uranium mi on navajo lands. the majority of the uranium that went into nuclear bombs, that ore came from this land. as early as the '50s, scientists, public health workers, knew of the dangers of radiation exposure. finally, in 1967, on the front page of the "washington post," there was an article, talking about the dangers of working with uranium. but even still, very little was

being done, on the reservation, to tell workers about these dangers and to protect them. >> we're continuing to endure toxic legacy of nuclear colonialism here. and we aren't just victims, we are resisting. >> i realized one thing i could bring to the show that was different was my work in the clinic with uranium miners. thank you guys for cyoing in. it hurts.ing today? >> those patients come visit with me every six months to get examined, to be re-certifiedor the benefits. so i wanted toring to the show some of ose narratives. then cyndy, with whom i've worked for 16 year she reminded me that her father was a uranium miner. >> he worked close to 20 years in the mines, not knowing the effects, years on down the road that this would have on them and us. he had good intentions to

provide for his family. but the cancer that he was agnosed with was directly related to working in the mines. >> to hear cyndy talk about her dad, it, yeah, just really touched me, you know. that history and the personal impact it had on this family of someone i know closely. so yeah that was the imagery i started working with.rs >> when i fisaw chip's piece, it brought tears to my eyes, really.th to kno it's posted where it's at in phoenix, and then also just north of flagstaff as well is it's a huming experience. and when i got tre to the exhibition itself, it was breathtaking.

for me, it important to keep the memory alive, for myen childrmy future grandchildren. i want them to know how my father helped us to become who we are today. >> living here, seeing how many people realize they've not been treated fairly, but they still live in a way that honors creation, the earth. that example keeps me grounded. and i feel really fortunate to have found this means of expression through art. >> sreenivasan: on the pbs newshour tomorrow, the fight for the soul of the democratic party as it's playing out in iowa's primaries. that's all for this edition ofpb

newshour weekend. i'm hari sreenivasan. have a good night. captioning sponsored by wnet captioned by media cess group at wgbh access.wgbh.org >> pbs newshour weekend is made possible by: bernd and irene schwartz. the cheryl and philip milstein family. sue and edgar wachenheim foundation. dr. p. roy vagelos and diana t. vagelos. j.p.b. foundation. the anderson family fund. rosalind p. walter barbara hope zuckerberg. corporate funding is provided by mutual of america-- designing customiz individual d group retirement products. that's why we're your retirement company. additional support has been provided by: and by the corporation for public broadcasting, and by

contributions to your pbs e station from viewers lu. thank you.

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